Facile synthesis of amorphous hollow cobalt-tin oxides for triethylamine detection

Amorphous material based gas sensors have attracted extensive attention due to the unique disordered atomic state and enhanced performance. In this work, the gas-sensitive amorphous hollow CoSnO 3 was synthesized by a calcining strategy. The gas response of amorphous hollow CoSnO 3 is 246.5 toward 100 ppm triethylamine at 120 °C. The gas responses of amorphous, weakly crystalline and crystalline CoSnO 3 are systematically compared and discussed. The experimental results indicated that the enhanced gas sensitivity can be explained by its amorphous hollow structure, advanced porosity and large surface area. The preparation method proposed in this paper will promote the progress of amorphous gas sensing materials in the future.